Complete the sentences with the correct relative pronouns and use commas where necessary. Then write D (defining) or ND (non-defining).

1. My friend Lan _____ is a nature-lover, often does volunteer work. _____

2. Hà Nội _____ is the capital of Việt Nam, has many places of interest. _____

3. This is the office _____ you can learn more about work experience. _____

4. The Việt Nam National Museum of History _____ is one of the top historical museums in Việt Nam, has 110,000 documents and antiques from the prehistoric time to 1945. _____

5. Are you the student _____ mother organises the music camp? _____